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Farm tractor overturn is a problem due partly to machine design and partly to human error. Human error contributions to overturn are considered here, from the joint perspective of modeling and empirical research, with the ultimate goal to provide recommendations for effective operator field training. Models obtained from the literature show that an operator's ability to sense changes in orientation degrades with current pitch or roll angle. A 3-axis simulator was constructed to test these predictions. In both younger and older subjects, errors in roll and pitch perception significantly increased with respective roll and pitch angles.

Advances in Industrial Ergonomics and Safety II. Proceedings of the Annual International Industrial Ergonomics and Safety Conference held in Montreal, Quebec, Canada, 10-13 June 1990. The Official Conference of the International Foundation for Industrial Ergonomics and Safety Research